/**
 * SDK-wide constants — single source of truth for limits, defaults and
 * backend-defined magic values.
 */
/** Backend session TTL in milliseconds (30 minutes). */
export declare const SESSION_TTL_MS: number;
/** Warn the user this many ms before session expires. */
export declare const SESSION_WARN_BEFORE_MS: number;
/** Default request timeout in milliseconds. */
export declare const DEFAULT_TIMEOUT_MS = 30000;
/** Number of automatic retries on transient network errors. */
export declare const MAX_RETRIES = 2;
/** Delay between retries in milliseconds. */
export declare const RETRY_DELAY_MS = 1000;
/** Maximum document image size the backend accepts (5 MB). */
export declare const MAX_DOCUMENT_BYTES: number;
/** Maximum video size the backend accepts (50 MB). */
export declare const MAX_VIDEO_BYTES: number;
/** Maximum snapshot / autoshot size (2 MB). */
export declare const MAX_SNAPSHOT_BYTES: number;
/** Accepted MIME types for document images. */
export declare const ACCEPTED_IMAGE_TYPES: readonly ["image/jpeg", "image/png", "image/webp"];
/** JPEG quality used when encoding captured frames (0–1). */
export declare const CAPTURE_JPEG_QUALITY = 0.92;
/** Backend-accepted challenge actions (UPPERCASE). Kept for backward compatibility. */
export declare const CHALLENGE_ACTIONS: readonly ["BLINK", "TURN_LEFT", "TURN_RIGHT", "TURN_HEAD", "OPEN_MOUTH"];
/**
 * Default action tags sent to the backend. The widget no longer runs a
 * discrete multi-step challenge (turn left, then right, then open mouth as
 * separate gated steps) — it's a single passive scan window where the user
 * is asked to blink and turn their head naturally, both within the same
 * window. Both tags are sent so the admin dashboard's "Challenge Actions"
 * label reflects what the user was actually asked to do; the backend does
 * not yet score these individually (see LivenessSerializer.get_liveness_
 * challenges' docstring) — they're descriptive, not a discrete step gate.
 */
export declare const DEFAULT_CHALLENGE_ACTIONS: readonly ["BLINK", "TURN_HEAD"];
/** Time limit for the natural-motion scan window, in seconds. */
export declare const LIVENESS_TIME_LIMIT_SECONDS = 12;
/** Ideal resolution for the front-facing liveness camera. */
export declare const CAMERA_IDEAL_WIDTH = 640;
export declare const CAMERA_IDEAL_HEIGHT = 480;
/**
 * Ideal resolution for rear-facing document capture camera. Matches the
 * document-photo compression target (see compressImage calls in
 * DocumentCapture.ts) — requesting less here would cap captured photos
 * below what compression is allowed to keep, which is what let camera
 * captures come out under-resolution for face-comparison cropping even
 * after the compression target itself was raised. `ideal` (not `exact`)
 * constraints degrade gracefully on hardware that can't hit this.
 */
export declare const DOC_CAMERA_IDEAL_WIDTH = 2000;
export declare const DOC_CAMERA_IDEAL_HEIGHT = 1500;
/**
 * Video bitrate used by MediaRecorder for liveness recordings — raised from
 * an earlier 250k baseline for sharper frames for SmartComply's face
 * extractor (see VideoRecorder.ts, the only consumer of this constant).
 */
export declare const RECORDING_BITS_PER_SECOND = 800000;
/** Max milliseconds to wait for an initial face detection before proceeding. */
export declare const FACE_DETECT_TIMEOUT_MS = 10000;
/** Polling interval for the face-present check (ms). */
export declare const FACE_DETECT_POLL_MS = 100;
/** How long (ms) the success overlay is shown before the flow advances. */
export declare const RESULT_OVERLAY_DURATION_MS = 2800;
/** localStorage key used to persist the browser fingerprint ID. */
export declare const FINGERPRINT_STORAGE_KEY = "_adhere_fid";
/** z-index for the SDK overlay — high enough to sit above any app content. */
export declare const OVERLAY_Z_INDEX = 99999;
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